High-tension insulator.



PATENTED DEC. 11, 1906.

- P. G. BAUM.

HIGH TENSION INSULATOR.

APPLICATION FILED 00124, 1905.

conductors.- 15

reason" of,"leakage or creepage oi the electricity over the surface of the insulators.

"tween which static s necessary that the latter be perfectly clean anddryand have sufficient intervening sur- To all whom it may concern.-

In order p v are commonly made with several petticoats, so as to present a minimum unpro- FRANKGEORGE BAUM, or

rnrnn'r errron.

SAN FRANCiSCO,' CALIFORNIA.

iiieii rsnsiowmsutnros.

7 No. 838,163. Specification of LettersYatent. Patented Dec. 11', 1906.

Application tiled October 24,1905. smart. 284,184.. 3

Be it known thatl, FRANK Gannon BAUM, a citizenof the United States, residing at San Francisco, in the county of San Francisco and State of California,- have invented certain new and useful Improvements in Highflension Insulators, of which the fol owing is a full, clear, and exact description.

My 'invention'relates to high-tension insulatorsr In long-distance transmission of electric currents it is common to employ very high voltages in order to transmit the re quired power with a minimum size of line In the insulation of potentials o fsixty thousand to one hundred thousand volts and over serious difiiculties arise by Theleakage is due principally to dust and moistureupon the surface of the insulators, which constitutes afilm for the conductiqn of electricity or minute conducting areas bedischarges may take place. In order to absolutely prevent leakage across the surface of the insulator, it 'is face between the conductor and its supporting means;- j

finally particularly pointed out in the appended claims.

ing the principles of my invention, partly in section and partlyin side elevation.

It will be understood that surfaces which are in position to have their insulation impaired during the storm by the coating of moisture. In carrying out my invention I Washed surfaces with petticoat-protected surfaces.

Referring to the parts are designated sign, 1 indicates a substantially the or inary form, having petticoats 2,3, 4, and 5 thereon, each of which has its interior surface ribbed or corrugated, so as to provide a greater insulating-surface.

6" indicates the usual cement fillings by which the different petticoat-s are secured together. I I

The upper petticoat 5 is provided with the usual annular groove 7. for the reception of any clamping or securing devices. I=make use of this groove 7 for-supporting a sripplemental and weather-washed insulating memdrawing, in which like by the same referenceto secure a dry surface, insulators tected surface to the atmosphere to gather ber, which constitutes 'an'essential feature of my invention, I have illustrated a practical form of this supplemental insulator comdust and damp. In time, however, even the protected surfacesare liable to become cov ered with a deposit of dust, which greatly impairs the insulation, and since the surfaces an insulator which shall be capable of resist- 4 'efiiciently in rainy weather,

are not exposed they are not washed off by the rains under these conditions.

The object of my invention is to provide high voltages,

ing very which shall operate and which shall 1 not be liable to-deterioration from accumulations of dust upon its surface.

A further. object of my invention is to provide an insulator which shall be of simple, strong, and compact construction and'which is adapted. to use with the existing posts and supporting-pins.

With these and other objects in view my invention consists in the construction, com-- bination, location ,and arrangement of parts all as will be morefully hereinaiter set forth,

as shown inthe accompanying drawmg, ant i prising an insulating other material, having annular ribs 9 extending along a considerable .distance at each end thereof. The central portion of the'tube is conveniently left smooth, as at 10, and fits in the groove 1 1 on the petticoat 5. 1

12 indicates supportingstraps by which the tube 8 is secured lator 1. prise stamped metal plates, slightly bent to surround the tube 8 and. the groove by clamping-bolts 13. The particular of supporting the tube 8 from the insulator 1 1S not important, it being merely essen-[ tial to'secure the two the ribbed ends 9 exposed and out of contact with the main insulator.

The supplemental insulator '8 is with means and I have shown the supplemental insulator longitudina s Wit In the drawing these straps comprovided I .....-"e'd ends.

The drawing shows an insulator embodyare exposed to the weather to a sufficient 'extent to be effectually washed off by the rains .malre use of the combination of weatheretticoated insulator of tube 8, of porcelain or to the body of the insu- 5 which are 7 and are clamped into place thereon method roe together so as to lea've for holding the line-wire in place,

uare hole 14 with this hole I-in- -r 10 washed by the rains, the two insulators being I 5 circuit-wire to .sert a supporting-frame of metal rod 15,

which may be held in place by a layer of cement '1-6 at its central portion. The ends 15 of the supporting-frame are afterward bent upwardlyand toward one another, so as to form alined sections 15 to which the linew ire may be conveniently attached. 17 .in-j "dicates the line-wire, which is strapped to the frame 15 by binding-wire 18. 'Thisform of supporting-frame'may of course be widely insulation strain lies betweenthe cement I6 and through the body of the insulators .8, '5,

4, 3, and 2, which is almost anabsolute insu lat-ion for practical purposes. ,Surface leakage may only take place along theinterior walls of the supplementalinsulator 8, over the entire area formed by the exterior-ribs '9,

and'finally over all of the successive exterior and interior surfaces of the qu'adruplepetticoated main insulator 1. In this action it will be observed that "the lea-kage must. always'traverse an extensive weather washed surface 1 1am'ely, the ribs 9'and an exten sive protect-ed surfacenamely, the .interior ribbed faces of the quadruple petticoats'2, 3 4, and

The ribs ,9 being washed the rains are always absolutely clean and secure iyel'y insulate the current. Having described my invention, I claim- 1 In a hlgh-potcntial insulator, a main insulating member having petticoats, and a supplemental insulator having a surface adapted to 'be washed by therains, both of said insulators being arranged to be travone of the circuit-wires to another of the same circuit. p

2. In a high-potential insulator, amain 1n- 'sulating member having etticoats with internal ribs thereon, and a supplemental insulator having 'ribs thei'eomadapted to be in series to oppose leakage currents from one another ofthe same electrical circuit. p 3. In ahigh-potential insulator, an insulating member having petticoats, a tubular for the attachment of a line u'ire.--

4. In a-high-potential insulator, a-m'ain' insulating member having pett-icoats, a tubular supplemental insulator secured thereto,

and a line-wire-attaching frame. extending through said tubular insulator.

5. In a high-potential insulator, a main insulator havingia ,p'etticoat :with'an annular groove, a supplemental tubular insulator having its surface-exposed to the rains, and

means surrounding said groove for attaching said supplemental insulator to the main insu.- lator. f j i J 6. In a high-potential insulator, a main insula'tor having a etticoat, a supplemental tubular insulator having ribbed ends and attached tosaid petticoat at itscent-ral-por-tion, and, a .line-wire carrying frame extending through said tubular insulator. I

7. 'In a high-potential insulator, a main insulating member having a petticoat, a sup ple m'ental insulating-tube secured to the top of said petticoat at the central ortion of said tube, annular ribs upon the-em s of said .tube, and a linew ire-carrying frame extending through said tube and supported thereby.

8. In a high-potential insulator, a main insulating member having a pettic-oat, atubular insulator supported from the top of said petticoat and having projecting end portions exposed tothe weather, and a line-wire supported by saidt-ube whereby an insulation surface thereof.

9. In a high-potential insulator, a main insulator having a petticoat, and integral tubular insulator having projecting ribbed ends and secured to said petticoat, and a linewire strain is imposed over the'weather-washed supported by said tubular insulator. e'rsed in series by the leakage currents from 10. In a high-potential insulator, a main insulating member having a vertical axis,

and a supplemental integral tubular insulator horizontally disposed upon said main insulator and having vert cal ribs or-corruga tions exposed to the weather.

. In witness whereof I subscribe my signa- W. A. I-IEATHCOVTE, J. T. PETERS. 

